The enzyme that connects nucleotides together during DNA replication is DNA polymerase.

Here's a breakdown:

* DNA polymerase reads the existing DNA strand (template strand) and adds complementary nucleotides to a new strand.

* It moves along the template strand, adding nucleotides one by one to the growing new strand.

* This process is called polymerization, hence the name DNA polymerase.

There are different types of DNA polymerase involved in replication, each with specific functions:

* DNA polymerase III is the main enzyme responsible for building the new DNA strand.

* DNA polymerase I removes RNA primers and fills in gaps left by them.

* DNA polymerase II is involved in DNA repair.

Let me know if you have any other questions!